Lamp-socket.



J. DARBY.

LAMP SOCKET. APPLICATION IiLED OGT.12, 1910.

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J. DARBY. LAMP SOCKET.

. APPLICATION FILED 001212, 1910, 1,056, 1 54. Patented Mar. 18, 1913.

2 SHEETS-SHEET 2,-

Fr /6r X WITNESSES: INVENTOR- f ATTORNEY JOHN DARBY, OFiSUMMIT. NEW JERSEY.

LAMP-SOCKET.

idliibgt 54.

Specification of Letters Patent.

that ontod .ttaix;

Application filed. October 12, 1910. Serial No. 586,688.

Be it known that I. Join' Danny. a citizen of the United States. and a resident of Summit, in the county of Union and State of New Jersey. have invented new and useful Improvements in Lamp-Sockets, of which the following is a specification.

The invention relates to incandescent, lamp sockets. and in certain of its aspects moro particularly to double pole. double break pull chain sockets. although in some aspects thereof the invention is :tlSOtLPPllcable to other current controlling devices.

The objects of the invention will appear in part horeinat'tor and will in part be obvious to those skilled in the art.

'lhoinvontion consists in the novel parts. constructions. arrangon'ionts. combinations and improvements heroin shown and described.

'l'he awompanyiug drawings. referred to horoin and torming a part hereof. illustratione embodiment ot tho invention. the samo serving in connootion with tho dosoription heroin to explain tho l)lllltl})lt.\ ol the in rontion.

()t the drawings: l iguro l is an olovation. ot a lamp socket constructed in accordance with tho principles ot' the invention. and showing the parts in what ma) ho tormod the current-oil position: Fig. 2 is a corresponding view to Fig. l but showing the parts in tho other. or what may lie torlnod tho current-on position just attor tho actuation ot. the current controlling parts: Fig. .l is a corrospoiuling view to Figs. 1 and 2. but showing the actuating means having moved back in position to begin the release movement for current controlling parts trom tho currenton position; Fig. at is a corresponding view to the foregoing figures. but showing the parts after the beginning of the current off or circuit breaking movement of the current controlling devices and actuating parts therefor; Fig. 5 is a. sectional plan on the line i r B of Fig. 1. looking in the direct-ion of the arrows; Fig. t3 is a partial vertical section on the line -D oi Fig. 5, looking in the direction of the arrows; Fig. 7 is a perspective View of certain supporting and current controlling devices shown of a larger size than the preceding figures; Fig. 8 comprises side and end views of the sliding circuit making and breaking device; Fig. 9 is an enlarged side at Fig. 11 from the loft: Fig. 13 is a si. lar view to Figs. 9 and 11 showing tin. p

piece returning} ast the holding device a 2- moving the commutator pioco ii....o the cnr- 7'0 rent on or circuit closing position: Fi. is an end elevation looking at Fig. iii room the left: Fig. 15 is an enlarged. perspw detail of the holding and releasing d tor the commutator; Fig. it") is a tr tarv elevation of a ditterent form t. a rocking and connected mechanism: Fig. l? is a section on line X X of Fig. it looking f in the diroct-ion ol' the arrows. but on a further enlarged scale; and Fig. IlS i a likewise enlarged view of the pawl niece hown also in Figs. 16 an -17 Referring to the accompanying drawn illustrating by war of example an eniln mont of the invention. a socket is shown having opposed heads 1 and Q of insulating material. Suitable. means for connective and supporting these heads in proper relation to each other are provided. the embodied form thereof comprisingstat dards l and -twhich are also utilized to port the current controlling devices. The Htitlltl' ard 3 is shown with angled ends 53 and n. and the standard 4t with similar angled ends 7 and S, for attachment. by screws or otherwise, to the socket heads 1 and The current and circuit controlling devices are shown arranged :for a douh polo, double break, that is to cause a gap to he made or to be bridged over in each. branch of the circuit to respect"; .o and make the circuit. The Qlllbfidiut form of such means comprise: a set of two contact pieces 11 and 19 in one branch of the orcuit, the contact piece 1.1. connecting to me line by suitable means snch as the binding screw 17. and the contact piece 12 to the screw shell 13 into' which the lamp screwed. The contact piece 12 has an angled foot 14 resting upon the socket tread.

converging toward each other.

2, and which is connected by the screw bolt tothe flange 16 of the screw shell 18, which flange rests against the opposit face of the socket head 2. The contact pieces are formed to have wiping contact with a connecting strip moving in a straight line and also according to one feature of the invention moving to and from the contact pieces to make and break the circuit. In the em bodied term the end of the contact piece 11 is bent or inclined at an angle as shown at 18 and the end of the contact piece 12 is bent at an angle as shown at 19. The two ends 18 and 19 are shown in alinement and In the other branch or arm of the circuit, is a set of two contact pieces 21and 22, the contact piece 21 connects to the line by suitable means such as the binding screw 23 and the contact "piece 22 connects by suitable means to the other lamp terminal. The foot or of said contact piece 252, resting on the socket head 2 connects by means of the screw bolt 95 to the spring plate 26 against which the central lamp terminal is adapted to press. The angled pieces 27 and 28 are similar and similarly arranged to the corresponding ones in the other branch of the circuit.

Means are provided movable into and out oi position to open and close the gap between each set of contact pieces in order to break or make the circuit, said means having a wiping contact with said contact pieces and moving in a straight path and further moving in one direction to close the gap and make the circuit and in the opposite direction to open the gap and bre: k the circuit. in the embodied form of such means a guide 2-30 is mounted between the standards 3 and l and upon said guide is .movably mounted a member 31 of insulatinc material. which may be for convenience called a commuiatmr. Said commutator is provided with conducting pieces which are moved into and out of position to close the gaps in the circuit as aforesaid. The commutator is centrally apertured at 32, the guide, 30 passing through said aperture. The central part oi? said member 31 is shown of somewhat elongated term to give a good bearing on said guide and is shown also with a. projection 3 on the lower side oi the guide which. is conveniently used to stop and position it against the standard 4. Said member 30 is shown having arms at and 35 extending to either side, on which arms the conducting pieces 36 and 37 are carried. Said conducting pieces have a spring action so that when they wipe into contact with the corresponding contact pieces they will press firmly thereagainst and also tend to keep the surfaces smooth and bright. The conducting; piece 36 is shown angled at the intermediate points 38 and 39 to fit about three sides of the arm 34 of the com- 1 ,Otithltid mutator 31. The ends 40 and 11 are shown bent diagonally outward and back, away from the arm 34:. Suitable fastening means are provided, shown herein as a pin 12 passing through the arm 34 and contact piece 36 and being headed at 43 and bent over at 'l-l into a groove in the arm 3 1'. The contact piece 37 and its associated parts may be of similar construction.

Holding devices acting to hold the commutator in either position are provided, and inthe present embodiment it is held in and impelled toward the open circuit position by a spring shown herein as a helical spring:

coiled about the guide 30 and acting between the commutator 31 and the standard The device for holding the connnntator in the circuit closing position also serves to release the commutator from the circuit closing position when acted upon by the actuating mechanism, the spring serving to return the commutator to the open circuit position. The embodied term of said holding device consists oi a spring mem ber 56 shown mounted on the standard 8 and having a detent portion 52" formed therein. shaped and positioned to take over and hold thecommutator piece 31. Said men'iber extends past said detent portion 57 and has an upwardly bent part 59 and extending laterally from said part as toward thecenter of the connnutator piece is a lint part 13$).

For the purpose of engaging with the holding means there is providml in the arm 37) of the comi'nutator piece a groove (30 the bottom oi. which inclines upwardly -from the side of the commutator facing the holding" member and terminating' in or near the opposite side thereof.

The actuating means for the connnutator 31, which actuating means comprises what may COliVGlllPlliIlV be called a controller having suitable guiding means and in the embodied form is mounted upon the guide 71 to slide to and fro thereon. Said controller 70 has a body portion 72 hung below the guide 71 and having two upturned ends 73 and 74, each of said ends being slotted at 75 and 76, respectively. to receive the guide 71. The slots are shaped to permit the cont-roller to rock on its guide as shown in l igs. 10 to 14, and for purposes which will be hereinafter described. The upturned end member 74 of the controller has its extremity curved and slotted as shown at T9 to receive the chain 80.

A spring acts to keep the controller in a certain position and the same spring is utilized in the present embodiment to return the conta oller '50 after actuation by the chain or other equivalent means. A spring 81 is coiled about the guide 71 and has one end -fastened in the notch 82 on the 'controller and the other end lined in notch 83 in the standard 3, the rotatory impulse oi the spring keeping the controller in one position but allowing it to rotate into another position and then causing it to return again.

The controller-it has an engaging member 90 for engaging with the commutator member to move it on certain actuations of the controller and this engaging member is also utilized to rock the controller by cooperating with a suitably located and shaped surface 91 on the controller. body. said surface being inclined upwardly from left to right. referring arr T. The controller 70 has also means for cat the holding and releasing device 5'6 m ne-.159 the commutator. and provided forthis purpose with a finger 92which engages with the laterally extending part 59 'of the holding and rcleasing device at; as will be later described.

The manner of operation of the heroin before described mechanism is substantially as follows: For convenience of description toward the right in [1 may be called front and forward and toward the left back and baclnvard and the terms up and down will be rcferredl'o the position of the socket in said figure. The 'part s may l assumed to be in the position in Fig. l the circuit then being broken. A pull on the chain 80 moves the controller 70 along the guide 71 compressing the spring 81 as it travels. The member 00 engages the back face of the controller- 70 carrying it forward to the position shown in Fig. the controller moves forward.'the inclined forward portion of the membe- 56. between the upturned portion '58 and the detent portion 57 will meet theincline'fiO-and ride up said incline, the spring member 76 being raised or flexed ll})Wtl1'('ll Y by the incline 60. When the back edge of the controller ll reaches the detent part 57 the detent snaps over said edge and holds the controller in the forward position as shown in Fig. 2. ln'tlie meantime the spring ends '40 and 41 of the conducting strip 36 have passed. respectively. into frictional sliding engagement with the rcverscly inclined cnds 1 'and ilfl'ot'. the contact pieces 11 and l2 as' shown also'in Fig. 2. The same thing has occurred with the spring ends of the correspondingconducting strip 37 and the inclined faces Bland 28 of the contactpieces 21 and in the other branch of tin-circuit; lhe gap in each branch of the circuit "is thus ch made in each'lirai u'lrio'r atfeach pole, at each of twopoints. one atwiclicontact point, the condurling strip in each case serving to bridge the gap. The pin 'are now in the position shown in l ig. The member 56 is in a higher position. however". than in Fig. l due to its being supported by' the incline lit). The-parts arc so constructtal and arranged that on the forwardmotion of the controller 70 carrying with itthe commutator piece 31, the finger travels at alion.

edai'id the circuit is higher level than. the laterally extending part 59 of the member 56 so that they do not cooperate in this forward movement. llhen the parts are in the position shown in Fig. 2. however. owing to the member so resting on the incline 60, the laterally extending part 59 is slightly above the level of the finger 92. lVhen the chain 80 released from the hand in Fig. 2 the spring 81 returns the controller 70 backward but the detent 57 holds the commutator piece 31 still in the circuit closing position. (Fig. 2.) As the controller moves back the finger 92 engages the laterally extending member 59 on its upper inclined face, and the controller 31 is thereby rocked as shown in Figs. 1 and H to pass said member When it passes clear thereof, the spring 81 rocks back the controller to its former position. This movementleaves the parts so positioned (Fig. :3 that on the next forward movement of. the controller. the finger 92 will engage the member 59 on its under face. The chain 90 is again pulled and, as the controller 70 moves forward. as stated. the linger 90 passes underneath the member 59 (see Figs. l, 9 and 10) and owing to its being inclined downwardly and forwardly the continued travel of finger b2 lifts the spring member 59 until the detent 57 is clear of the controller 31. The spring moves the commutator piece ll back to the left hand posi- The member 59 has. however. ated to rock the controller TU about its guide Tl and against its spring (\l. until the engaging member 90 is lifted above the commutatorpiece 31 as shown in Fig. 10. thereby permitting the commutator piece to snap back to the left ahead of the controller. This movement of the controller breaks the circuit in both branches and at both points in each branch as previously explained in connection with making the circuit. The position of the parts now, is as shown in Figs. ll. and 19 of the drawings. When the chain 80 is released by the hand. the controller will then return to the left. The controller 70 must also pass the commutator piece 31 in order to again get into the position shown in F 1 so that at the nextpull on the chain the controller will take the commutator piece forward again to make the circuit as already described. When the chain is released when the parts are in the positions shown in Figsll and 12. the spring 81 drives the controller Tiltoward the left. During this movement the engaging member engages the inclined surfaces 91 on the commutator piece (see es -iccially Figs. 7 and 12) and the controller is rocked on its guide to pass the colmnntator piece. and after passing it is rocked back into position by its spring 81. The parts are now back in the positions shown substantially in Fig. 1.

The. form of controller shown in Figs. 1o,

too

so 631 U 1.? and 18 provides a safety device to prevent the chain ever coming in contact with any current carrying parts and also the economy oi" space. The chain is carried inside the tubular guide or slide on which the controller moves. The slotted openings in the tubular guide allow for the rocking ot' the controller and also for the wire staple to pass through, for the chain holding.

i -That 1 do claim as my invention and desire to secure by Letters Patenh is:

1. t lamp socket including in combination a commutator reciprocating on a straight guide arranged transversely of the socket, two contact pieces in one branch of the circuit with a gap therebetween, two contact pieces in the other branch of the circuit with gap therebetween, two conducting pieces carried upon said commutator and insulated from each other, and a separately moving actuator, slidable along a straight guide parallel with first said guide, for reciprocating said commutator to and fro to cause said conducting pieces to alt-ernatel v close and open the gaps in the two branches of the circuit.

2. ll. lamp socket including in combination a commutator reciprocating on a straight guide arranged transversely of the socket, two contact pieces in one branch of the circuit with a gap thercbctwecn. two contact pieces in the other branch of the circuit with a gap tlIOI'tbPlW QGIL two conducting pieces carried upon said commutator and insulated from each other. and a separaielv moving actuating mechanism, slidable along: a straight guide parallel to first said guide, which on one actuation moves said commutator in one direction, wherein the respective conducting pieces close the gaps in the circuit and on the subsequent actuation cause said commutator to move in the opposite direction, wherobv the rcspcciivc conducting pieces open the gaps in the circuit.

3. It lamp socket including in combination a commutator reciprocating on a straight guide arranged transversely of the socket, two contact pieces in one branch oi the circuit with a gap therebctween, two

contact pieces in the other branch of the circuit with a gap therebetwcen. two conducting pieces carried upon said commutator and insulated from each other, and a separately moving actuating mechanism. slidable along a straight guide parallel to first said guide, which on one actuation moves the commutator in one direction on its path of travel andon the subsequent actuation causes said commutator to move in the opposite direction on its path of travel, Whereb}, on one movement of the commutator the conducting; pieces close the gaps in their respective branches oiithe circuit and on the succeedmovement said conducting ocate r said gaps in their respective branches of the circuit.

at. A lamp socket including in combination a commutator reciprocating" in a straight path two contact pieces in one branch of the circuit with a gap thercbetween, two contact pieces in the other branch of the circuit with a gap therebetween, two

conducting pieces carried upon said commutator and insulated from each other, a st night guide along which said commutator travels, a spring urging said commutator in one direction along said guide, a detent for holding said commutator in position against said spring and Where the gaps in the two branches of the circuit are closed by said two conducting pieces. respectively. a straight guide, a controller sliding on said second guide for moving said commutator into said circuit closing position on one movement and for releasing it from said detent on the next subsequent movement, whereby said commutator is free to move in the opposite direction under theaction of said spring.

5. A lamp socket including in combination a commutator reciprocating in a straight path, two contact pieces in one branch of the circuit With a gap therebe tween, two contact pieces in the other branch of the circuit with a gap t-herebetween. two conducting pieces carried upon said commutator and insulated from each other. a straight. guidc along which said commutator travels. a spring urging said commutator in one direction along said guide, a detent for holding said commutator in position against said spring and where the gaps in the two branches of the circuit are closed by said two conducting pieces. respectively. a straight guide, a controller reciprocating" on said second guide for moving Said commutator into said circuit closing position on one reciprocation and for releasing it trom said dctcnt on the next subsequent reciprocation. whcrcbv said commutator is two to move in the tiplmslit, direction under the action of said spring".

(3. A. lamp. socket including in combination a commutator reciprocating to and fro on a straight guide arranged transversely of the socket. to make and break the circuit. and actuating means reciprocating to and fro on a stri ight guide parallel to first said guide separately from said commutator for causing said commutator to move in one direction to close the circuit and in more in the opposite direction to break the circuit.

7. fin incandescent lamp socket including in comhination a slidable commutator. a spring'pressing said commutator in one direction, a detent for holding said commu' tator against its spring. a guide, a controller slidahle on and rockable about said guide pieces open to move saidcommutator against its spring and to cause the detent to release the commutator, said controller rocking on its guide when engaging said detent to permit the commutator to pass the controller under I the impulsion'of said spring.

8. An incandescent lamp socket including in combination a slidable commutator, a spring pressing'said commutator in one direction, a detent for holding said commutator against its spring, a guide, a controller slidable along and rockable about said guide, a spring pressing said controller in one direction and rocking said cont-roller to cause it to engage the commutator and pass the detent on one reciprocation to cause the commutator to slide to circuit closing position and to be held there by the detent.

9. An incandescent lamp socket including in combination a slidable commutator, a spring pressing said commutator in one di rection, a detent for holding said commutator against its spring, a guide, a controller slidable along and rockable about said guide, a spring pressing said controller in one direction and rocking said controller to cause itto engage the commutator. and pass the detent on one reciprocation to cause the commutator to slide to circuit closing position and to be held there by the detent, said detent rocking said controller on the next subsequent reciprocation of the controller to release the detent and permit the commutator to pass the controller.

10. An incandescent lamp socket includingin combination aslidable commutator thereon, a spring pressing said commutator Copies of this patent may be obtained for in one direction, ,a detent for holding said commutator against its spring, a slidable controller, a hollow guide on which said controller slides, a pull chain connected to said controller and supported within said hollowguide out of cont-act with the other parts of the socket.

11. An incandescent lamp socket including in combination a straight guide, a slidable commutator thereon, a spring pressing said commutator in one direction, a detentfor holding said commutator against its spring, a slidable controller, a straight hol low guide on which said controller slides, a pull chain connected to said controller and supported Within said hollow guide out of contact with the other parts of the socket.

112. An incandescent lamp socket includ-' ing in combination a straight guide, a slidable commutator thereon, a spring pressing said commutator in one direction, a detent for holding said commutator against its spring, a slidable and rockable controller, a g

straight hollow guide on which said con troller slides and rocks, a pull chain connected to said controller and supported Within said hollow guide out-of contact with the other parts of the socket.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

. JOHN DARBY.

W itnesses Rosa MENK, LOUELLA F. LlTTLE.

five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

